Loom parallel



1938 c. D. BROWN 2,139,439

LOOM PARALLEL Filed March 22, 1938 INVENTOR C451 D, Deon/N.

1a M%M ATTORNEY.

Patented Dec. 6, 1938 PATIENT OFFICE LOOM PARALLEL Carl D. Brown,Hopedale, Mass, assignor to Draper Corporation, poration of MaineHopedale, Mass, a cor- Application March 22, 1938, Serial No. 197,438

2 Claims.

The present invention pertains to parallel motions for fly shuttle loomsand has more particular reference to the picker stick engaging andpositioning means thereof.

Parallel motions of the type to which my invention applies commonlyinclude a parallel which is fixed to the loom rocker shaft, a pickerstick having a shoe thereon which rocks on the parallel, the pickerstick projecting downwardly through an opening in the parallel, and athrust device carried by the parallel for receiving the thrust of thelower end of the picker stick. Such thrust device usually consists of aparallel plug, so-called, fixed in a recess in the parallel andprojecting into the aforesaid opening.

Prior parallel plugs made of wood are objectionable in that they wearrapidly and thus allow the picker stick to become improperly positioned,as well as requiring frequent replacement of the plugs. Prior parallelplugs made of cast iron or the like are objectionable in that it isdifiicult to shape or fit them to the recess in the parallel, whichrecess is usually cored in the cast body of the parallel and istherefore usually irregular in size and shape.

A principal object of the present invention is to provide a parallelhaving a parallel plug in a recess therein as aforesaid, which parallelshall have a resilient body whereby it can be firmly driven into theirregular recess but which shall have a steel wear plate for receivingthe thrust of the picker stick to thereby prevent wear of the plug, andwhich plateshall be extended .along converging top and bottom sides ofthe parallel plug into said recess.

The foregoing and other objects of the invention are accomplished in theconstruction illus-' trated on the accompanying drawing, of which:

Fig. 1 is a front elevation, partly in section, of a parallel motioncomprising the preferred embodiment of my invention;

Fig. 2 is a plan view of part of the mechanism of Fig. 1, to a largerscale; and

Fig. 3 is a detail view in perspective of the preferred form of myimproved parallel plug.

The parallel mechanism shown on the drawing is applied to a fly shuttleloom which is not illustrated in detail because the parts and mechanismsthereof not shown may be of any usual construction and form no part ofthe present in vention. The drawing does show, in addition to the pickerstick and parallel motion to be described, part of the left hand loomside I which supports the usual rocker shaft 2.

A parallel 3 is fixed to the end of the rocker shaft 2. A picker stick 4has its lower end 5 projecting downwardly through an opening 6 in theparallel 3. A shoe 1 is fixed to the picker stick adjacent the lower endthereof. The shoe 1 has a curved surface 8 which rocks on the flat uppersurface 9 of the parallel. A spring return drum it is connected to thelower end of the picker stick as by means of a flexible strap II. Theparts as thus far described may be similar to corresponding parts ofprior looms, except that the parallel 3 is provided with a novelparallel plug which will be hereinafter described.

The upper end of the picker stick 4 is given its operative movement bybeing pulled inwardly of the loom, which is toward the right on Fig. 1,by the usual lug strap, not shown. To resist this inward pull andposition or hold the lower end of the picker stick against inwardmovement, the parallel 3 is provided with a parallel plug which isindicated generally at l2 on Figs. 1 and 2 and is shown detached fromthe parallel on Fig. 3. This parallel plug may bear against a weartongue l3 which is attached to and, in effect, forms a part of thepicker stick.

The parallel 3 is provided with a recess l4 which communicates with theopening 6. The recess I4 is tapered in that it is appreciably wider,vertically, at its outer end where it opens into the opening 6 than itis at its other end, as shown by Fig. 1. The parallel may be made ofcast iron, in which case the recess M will be made by using aconventional. core and is apt tobe more or less irregular in size andshape.

The parallel plug l2 shown on the drawing consists of a body portion [5having a steel wear plate l6 covering the projecting end thereof. Thebody I5 is made of a relatively elastic nonmetallic material, preferablywood. The body I5 is tapered to conform approximately to the shape ofthe recess M. The upper and lower surfaces of the body l5 are recessedas suggested at H, Fig. 3, from about midway of the length of the plugto the outer or left hand end thereof. The recesses are shaped toprovide the plug with a relatively thick end or nose l8 and upper andlower surfaces l9 and 20 which converge in the direction from the nose I8 toward the opposite end of the plug.

The wear plate I6 is formed from a strip steel material which is bent tocompletely cover the nose l8 and to provide upper and lower legs 2| and22, respectively, which extend along the converging surfaces l9 and 20.The legs 2| and 22 may be bent together slightly, before the wear plateis attached to the body l5, so that they will grip the surfaces l9 and20 and thus hold the wear plate in place when the plug is detached fromthe parallel.

The parallel plug may be attached to the parallel merely by being drivenfirmly into the recess l4 and the legs 2| and 22 are long enough toextend into the recess when the plug is so attached. It will be apparentfrom Fig. 1 that with the legs 2| and 22 converging and extending intothe recess I4 the wear plate cannot become loose on the body l5 or moveaway from the nose l8 thereof. The parallel plug constructed as abovedescribed is sufliciently elastic that when driven into the recess II itwill conform to the shape of the recess and will be held firmly inplace, without any individual shaping or fitting. The steel wear plate[6 is extremely serviceable as compared to said wood plugs, the plate inthis respect being comparable to prior cast iron plugs either with orwithout antifriction rollers. The parallel plug of the present inventionis thus possessed of the advantages of both the wood and the iron plugswithout the disadvantages of either.

Having fully disclosed the preferred embodiment of my invention, Iclaim:

1. In a loom, the combination of a parallel having an opening forreceiving a picker stick, with a tapered parallel plug fixed in a recessin said parallel and having the thick end thereof projecting into saidopening, said parallel plug comprising a wooden body driven into saidrecess and having said projecting end covered with a steel plate, thetop and bottom sides of said body being recessed to provide a relativelythick rounded nose and fiat surfaces extending from said nose andconverging in a direction toward the thin end of said plug, and saidplate extending into said recess along said converging surfaces andbeing held in place by engagement with said body and with the walls ofsaid recess in said parallel.

2. As an article of manufacture, a parallel plug for receiving thethrust of the lower end of a picker stick, said plug comprising a woodenbody having its top and bottom sides recessed to provide a relativelythick nose and converging surfaces extending from said nose toward theopposite end of said body, said nose being covered with a steel Wearplate having legs extending along and gripping said converging surfacesfor holding the plate in place on said body.

CARL D. BROWN.

